CVE-2026-74997: high-severity vulnerability in Roundcube Webmail
Published
E-mail alert when it lands in KEV, gets a public PoC or its score goes up.
21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 8.8epss 0.8%
In Roundcube Webmail before 1.6.18 and 1.7.x before 1.7.3, the cmd_learn driver of the markasjunk plugin is subject to remote code execution via crafted placeholder replacement values. This issue only affects Roundcube instances using the markasjunk plugin with its cmd_learn driver.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Affected products
Roundcube · WebmailRelated CVEs — Roundcube Webmail
In the same product, most dangerous first.
References
https://github.com/roundcube/roundcubemail/commit/14044f843cfacbe78b042f659e379d6b4497aa7chttps://github.com/roundcube/roundcubemail/commit/495d211638f222336b20f4744545c53712426c2ahttps://github.com/roundcube/roundcubemail/commit/b8f90e28a46d42e79a69568cba897f8f4223d9cdhttps://github.com/roundcube/roundcubemail/releases/tag/1.6.18https://github.com/roundcube/roundcubemail/releases/tag/1.7.3https://roundcube.net/news/2026/08/09/security-updates-1.6.18-and-1.7.3